13321531860 has 192 divisors, whose sum is σ = 46383171072. Its totient is φ = 2781609984.

The previous prime is 13321531859. The next prime is 13321531879. The reversal of 13321531860 is 6813512331.

It is a super-2 number, since 2×13321531860² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 517044 + ... + 542196.

It is an arithmetic number, because the mean of its divisors is an integer number (241579016).

Almost surely, 2^13321531860 is an apocalyptic number.

13321531860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13321531860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23191585536).

13321531860 is an abundant number, since it is smaller than the sum of its proper divisors (33061639212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13321531860 is a wasteful number, since it uses less digits than its factorization.

13321531860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25282 (or 25280 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 13321531860 in words is "thirteen billion, three hundred twenty-one million, five hundred thirty-one thousand, eight hundred sixty".